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In a previous paper we considered a sequence of maps on a complete metric space $(X,d)$ and derived an extension of the Banach fixed point theorem. We showed that backward trajectories of maps $X\to X$ converge under mild conditions and…

Functional Analysis · Mathematics 2019-07-26 Nira Dyn , David Levin , Peter Massopust

We study Boolean networks which are simple spatial models of the highly conserved Delta-Notch system. The models assume the inhibition of Delta in each cell by Notch in the same cell, and the activation of Notch in presence of Delta in…

Discrete Mathematics · Computer Science 2020-07-31 Elisa Tonello , Heike Siebert

The so-called Fundamental Theorem of Dynamical Systems -- which(1) relates attractors and repellers to the chain recurrent set and (2) gives the existence of a complete Lyapunov function -- can be seen as a means of separating out…

Dynamical Systems · Mathematics 2025-08-15 Andrew D. Lewis

In this paper we extend and prove in detail the Finite Rank Theorem for connection matrices of graph parameters definable in Monadic Second Order Logic with counting (CMSOL) from B. Godlin, T. Kotek and J.A. Makowsky (2008) and J.A.…

Logic in Computer Science · Computer Science 2015-07-01 Tomer Kotek , Johann A. Makowsky

We present a mechanism for the emergence of strange attractors (observable chaos) in a two-parameter periodically-perturbed family of differential equations on the plane. The two parameters are independent and act on different ways in the…

Dynamical Systems · Mathematics 2022-01-05 Alexandre A. P. Rodrigues

Recordings of increasingly large neural populations have revealed that the firing of individual neurons is highly coordinated. When viewed in the space of all possible patterns, the collective activity forms non-linear structures called…

Neurons and Cognition · Quantitative Biology 2025-11-14 Arianna Di Bernardo , Adrian Valente , Francesca Mastrogiuseppe , Srdjan Ostojic

Boolean networks are conventionally used to represent and simulate gene regulatory networks. In the analysis of the dynamic of a Boolean network, the attractors are the objects of a special attention. In this work, we propose a novel…

Artificial Intelligence · Computer Science 2019-09-19 Tarek Khaled , Belaïd Benhamou

This paper is concerned with the dynamical properties of deterministically modeled chemical reaction systems. Specifically, this paper provides a proof of the Global Attractor Conjecture in the setting where the underlying reaction diagram…

Dynamical Systems · Mathematics 2011-05-18 David F. Anderson

We consider invertible linear maps with additive spherical bounded noise. We show that minimal attractors of such random dynamical systems are unique, strictly convex and have a continuously differentiable boundary. Moreover, we present an…

Dynamical Systems · Mathematics 2023-10-06 Jeroen S. W. Lamb , Martin Rasmussen , Wei Hao Tey

Directed graphs are ubiquitous models for networks, and topological spaces they generate, such as the directed flag complex, have become useful objects in applied topology. The simplices are formed from directed cliques. We extend Atkin's…

Algebraic Topology · Mathematics 2022-02-16 Henri Riihimäki

The recently introduced continuous Hopfield network (see Ramsauer et al.) exhibits large memorization capabilities, which manifest as attractive fixed points of its update rule -- a differentiable function consisting of two linear mappings…

Dynamical Systems · Mathematics 2026-04-06 Hans-Peter Beise

We already know a great deal about dynamical systems with uniqueness in forward time. Indeed, flows, semiflows, and maps (both invertible and not) have been studied at length. A view that has proven particularly fruitful is topological:…

Dynamical Systems · Mathematics 2019-05-17 Shannon Negaard-Paper

We study the stable attractors of a class of continuous dynamical systems that may be idealized as networks of Boolean elements, with the goal of determining which Boolean attractors, if any, are good approximations of the attractors of…

Molecular Networks · Quantitative Biology 2009-11-13 Johannes Norrell , Björn Samuelsson , Joshua E. S. Socolar

It is well understood that the structure of a social network is critical to whether or not agents can aggregate information correctly. In this paper, we study social networks that support information aggregation when rational agents act…

Theoretical Economics · Economics 2020-11-11 Itai Arieli , Fedor Sandomirskiy , Rann Smorodinsky

Identification of attractors, that is, stable states and sustained oscillations, is an important step in the analysis of Boolean models and exploration of potential variants. We describe an approach to the search for asynchronous cyclic…

Discrete Mathematics · Computer Science 2024-03-29 Elisa Tonello , Loïc Paulevé

The paper is focused on the existence problem of attractors for foliations. Since the existence of an attractor is a transversal property of the foliation, it is natural to consider foliations admitting transversal geometric structures. As…

Differential Geometry · Mathematics 2017-03-23 Anton S. Galaev , Nina I. Zhukova

In some maps the existence of an attractor with a positive Lyapunov exponent can be proved by constructing a trapping region in phase space and an invariant expanding cone in tangent space. If this approach fails it may be possible to adapt…

Dynamical Systems · Mathematics 2021-08-16 P. A. Glendinning , D. J. W. Simpson

In this paper we provide a dynamical characterization of isolated invariant continua which are global attractors for planar dissipative flows. As a consequence, a sufficient condition for an isolated invariant continuum to be either an…

Dynamical Systems · Mathematics 2018-02-19 Héctor Barge , José M. R. Sanjurjo

Combinatorial threshold-linear networks (CTLNs) are a special class of recurrent neural networks whose dynamics are tightly controlled by an underlying directed graph. Recurrent networks have long been used as models for associative memory…

Neurons and Cognition · Quantitative Biology 2023-11-21 Carina Curto , Jesse Geneson , Katherine Morrison

In this paper we present a comprehensive mechanism for the emergence of strange attractors in a two-parametric family of differential equations acting on a three-dimensional sphere. When both parameters are zero, its flow exhibits an…

Dynamical Systems · Mathematics 2020-05-19 Alexandre A. P. Rodrigues